Henry poeter



(No Model.)

H. PORTER. DOOR SPRING AND CHECK.

No. 602,645. Patented Apr. 19,1898.

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Unrrnn S'rn'rns PATENT HENRY PORTER, OF NEW YORK, N. Y.

DOOR SPRING AND CHECK.

SPECIFICATION forming part of Letters Patent No. 602,645, dated April19, 1898.

Application filed March 12 1897.

To aZZ whom it may concern.-

Be it known that I, HENRY PORTER, a citizen of the UnitedStates,residing at New York, in the county of New York and State of NewYork, have invented certain new and useful Improvements in Door-Checks;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

The-object of my invention is to provide an exceedingly cheap, simple,easily-operated, and durable device for automatically cushioning,closing, or holding back swinging doors, windows, and similarstructures.

To this end my invention consists in the peculiar features andcombinations of parts more fully described hereinafter and pointed outin the claims.

In the accompanying drawings, Figure 1 represents a top perspective viewof my device, wherein the door to which it is attached is shown inclosed position; and Fig. 2, a top view of my device with the door inclosed position, dotted lines indicating the positions assumed by theparts when the door is thrown half and all the way back.

The reference-letter a indicates an ordinary house-door hung in a commonrigid frame 6 upon hinges c. To the upper part of the door is attachedby screws (Z a flat spring or elastic bar or arm 6, which extendsbackward in the direction of the hinges, projecting outwardly andobliquely upward beyond the top of the door and terminating at a pointon the frame portion lying inside the axis or hinges of the door, or,more explicitly, at a point over that portion of the frame lying betweenthe axis of the door and its free end. The free end of the spring isconnected with the frame by a hinge-like connection consisting of anS-shaped link f, the opposite ends of which pass through a screw eye gon the frame at a point between the axis of the door and where the fixedend of the spring is attached. The screw-eye is placed on the frame sothat the hook f on the link will pass through it horizontally in orderto allow the outer end of the link to swing in the arc of a Serial No-62'7,201. (No model.)

horizontal circle to the right or left over the axis of the door duringthe opening and closing movements of the latter. The free end of thespring should be so connected that the link will pull gently butconstantly upon it in order to hold the door closed.

The preferred construction of my device having now been set forth, Iwill describe its operation.

If the door be closed, a slight pressure on it will be all that isnecessary to start it open. A continuation of the pressure will causethe link to draw the end of the spring nearer to the door, at the sametime carrying the end .of the spring and outer end of the linkhorizontally from left to right around until they pass over thedead-center, or, in other words, over and behind the hinges or axis ofthe door, whereupon the direction of pull upon the spring will bereversed and transferred to the opposite side of the axis of the door tohold it open. During this movement the end of the spring-arm will turnas on a pivot in the outer hook f of the link, and the inner hook f willturn in the same Way on the screw-eye g. Thus the free end of thespringarm is connected to theframe portion of the door by a connectionhaving two pivotal points.

While the preferred form of my device has been shown and described, yetit is evident that the structure could be infinitely varied in manyslight ways that might suggest themselves to a skilled mechanic withoutdeparting from the scope and spirit of my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination with a hinged door and its casing, of a plate-springfixedly secured to and having its free end projecting away from thedoor, and a link secured to the free end of the spring and to arelatively-immovable object, such as the door-frame, the arrangementbeing such that the free end of the spring passes over and behind theaxial line of the hinges of the door, whereby the door is closed and isheld open, substantially as described. I

2. The combination with a hinged door and its casing, of a plate-springfixedly secured to and having its free end projecting away from andabove the top of the door, and a link secured to the free end of thespring and to a relatively-immovable object, as the doorfrarne, thearrangement being such that the free end of the spring passes over andbehind the axial line of the hinges of the door,whereby the door isclosed and is held open, substantially as described.

3. The combination with a hinged door and its frame, of a plate-springhaving one end fixed on and movable With the door, and its free endprojecting away from and beyond the edge of the door, a fastening deviceon HENRY PORTER.

l/Vitnesses:

R. S. WARFIELD, R. G. DU BoIs.

